Sawing carriage



Patented Apr. 28, 1931 UNITED STATES PATENT; OFFICE y WILLIAM S. SMITH, F PORT MOODY, BRITISH COLUMBIA, CANADA SAWING CARRIAGE ,n

Application mea october 25,' 193e. serial zivafienare.'

This invention relates to a device for the manufacture of the product of United States Patent No. 1,593,800, whereby the product may be manufactured economically in commercial quantities.

This invention is designed as an improvement in sawing devices and is intended to be an auxiliary to standard sawing equipment.

An object of the invention has been to provide in simple form and manner a device versatile in character and capable of handling a wide range of material as to thickness and length.

Still another object of the invention has been to provide in a device of this character the necessary rigidity and flexibility requisite as owing to the character of the material worked with great variations may be found therein, so that it is necessary to provide flexibility in the equipment and means to make rigid instantaneously the flexible parts before operating upon the material with the saw.

To the attainment of the foregoing objects 2D I have invented the new and novel construction more specificially described in the following specification and illustrated by the accompanying drawings, in which:

Figure 1 is a plan view of my invention.

Figure 2 is a part sectional view and elevation of one of the bell crank levers and vertical angle members.

Figure 3 is an elevational view of bell crank lever and vertical angle member with board held therebetween for sawing purposes.

In these drawings like numerals indicate like parts and 5 indicates a board slidable between parallel guides 6 positioned upon the table 7 of a band saw 8 and slidable past the saw. Down the centre of the board and starting from one end is the saw slot 9 for the saw to operate in and this slot is closed at its starting end by a transverse block 10 secured to the board 5 by wing nuts and bolts 11,

thereby providing reinforcement to the board 5.

Positioned on the slidable board and on each side of the saw slot 9, but spaced apart, are upright angle brackets 12 having a slot 13 in the base thereof and secured to the board 5 by'bolt and nut 14, the slot 13 providing a limiting adjusting 'range tothe brackets 12. The vertical uprights of the brackets 12 are faced with wooden facings 15 secured thereto by the bolts and nuts 16. f .55

Opposite the brackets 12 and on the 0pposite side of the slot 9are positioned bell crank levers17 pivoted at 18 turned ends 19.

The upturned ends 19 opposite the angle @o brackets 412havemetal face pieces 20 secured thereto 'by a loosely tted bolt 21 whose head is heavily coun-tersunkin the face piece 20. Below the bolt 21 is a helical compression spring 22 set in the recess 23 formed in the upturned end 19. f

The spring 22 holds apart the face member 2O from thebottom yofthe upturned end 19, therebyY assuring a positive grip over the whole-width of any board placed between the angle bracket 12 andthe bell crank levers 17 and permitsl boards of uneven thickness to be held securely.

The top end of the upright 1 9 is slightly ,5 rounded at 24 and thispermits of a rocking motion of the face member 2O through the loosely fitted'bolt" 21. l

Positioned at one end of the vslidableV board 5 is the lever 25 pivoted on the'bolt 2 6 to the centre of the board 5 and having a handle .39 27 on one end. Pivotally secured to the lever 25 are the rods 28 passing through holes 29 in the arms of the bell crank levers 17 and having the compression springs 30 on'each sideof the lever arm mounted upon the' rods 28 and secured there by the nuts 31. Movement of the handle 27 of the lever 25 causes the bell crank levers 17 to move to or from the faces of the iiXed angle members 12 in unison and enables a board to be gripped .f therebetween for sawing purposes and be traversed past the saw by the slidable board 5. Having now described my invention, what I claim and desire to be protected in by Letters Patent, is: 9.5 1. In a device of the character described the combination comprising a sawing machine, aboard slidable between parallel guide members and by the saw of said sawing machine, said board having a slot down the cenand having'upipo ter from one end thereof for the reception of a saw therebetween, said slot being closed at its starting end by a transverse clamp member suitably secured to said slidable board, said board having positioned and spaced apart thereon a pair of levers and a pair of vertical angle members,psaid angle members having 'vertically positioned face members secured thereto, said levers having one end upturned, face members held apart from'said upturned ends, 'means 'roekably' securingsaid last named face members to the respective upturned ends of said levers, and yieldable means interposed between said last named Y 15 face members and their respective levers upturned ends, said last named face members ybeing opposite to` said vertical angle members to grip and hold aboard therebetween for sawing, and means to operate said levers in '20 unison. p

2. In .al device yof the character described, the combination comprising a sawing machine, a board slidable between parallel guide members and bythe saw of said sawing ma- 25 chine, said board having a slot down the centre from one end thereof for the reception of a saw therebetween, said slot being closed at its starting end by a transverse clamp member secured to said slidable board by bolts and ,30 wing nuts, said board having positioned and spaced apart thereon a pai-r of bell crank levers and vertical angle members, said angle members having vertically positioned wooden face members secured thereto, said bell crank 35 4levers having one end upturned, said up-V turned ends having a bolt passing therethrough, said bolt carrying a face member held apart from said upturned ends by a helical spring, said face member being opposite o-to: said vertical angle member to grip and hold a board therebetween -for sawing, and means to operate said belll crank levers in unison, said means comprising a pair of rods and a handled lever pivotally` engaged to said -4-5 rods and thereby said bell crank levers, and said slidable board whereby said bell crank levers are caused to move to or from said verticalangle members, when said handled lever is moved.

50 .In testimony whereof I aHX my signature.

WILLIAM S. SMITH. 

